<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./vue.js"></script>
</head>

<body>
    <div id="app">
        <button @click="flag=!flag">{{flag?'隐藏':'显示'}}</button>
        <p v-if="flag">v-if我显示了....</p>
        <h1 v-show="flag">v-show我显示了.....</h1>
    </div>

    <script>
        new Vue({
            el: "#app",
            data() {
                return {
                    flag: true
                }
            }
        })

    </script>

</body>

</html>